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Image
Pre-slew 15.0-350.0 keV image (Event data)
# RAcent DECcent POSerr Theta Phi Peak Cts SNR Name
245.8788 7.6134 0.0151 36.9120 -14.9387 1.8501323 12.764 TRIG_00441454
Foreground time interval of the image:
-9.099 73.101 (delta_t = 82.200 [sec])
Background time interval of the image:
Lightcurves
Notes:
- 1) The mask-weighted light curves are using the flight position.
- 2) Multiple plots of different time binning/intervals are shown to cover all scenarios of short/long GRBs, rate/image triggers, and real/false positives.
- 3) For all the mask-weighted lightcurves, the y-axis units are counts/sec/det where a det is 0.4 x 0.4 = 0.16 sq cm.
- 4) The verticle lines correspond to following: green dotted lines are T50 interval, black dotted lines are T90 interval, blue solid line(s) is a spacecraft slew start time, and orange solid line(s) is a spacecraft slew end time.
- 5) Time of each bin is in the middle of the bin.
1 s binning
From T0-310 s to T0+310 s
From T100_start - 20 s to T100_end + 30 s
Full time interval
64 ms binning
Full time interval
From T100_start to T100_end
From T0-5 sec to T0+5 sec
16 ms binning
From T100_start-5 s to T100_start+5 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
8 ms binning
From T100_start-3 s to T100_start+3 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
2 ms binning
From T100_start-1 s to T100_start+1 s
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
SN=5 or 10 sec. binning (whichever binning is satisfied first)
SN=5 or 10 sec. binning (T < 200 sec)
Quad-rate summed light curves (from T0-300s to T0+1000s)
The mask-weighted light curves based on cleaned DPHs
Spectral Evolution
Spectra
Notes:
- 1) The fitting includes the systematic errors.
- 2) When the burst includes telescope slew time periods, the fitting uses an average response file made from multiple 5-s response files through out the slew time plus single time preiod for the non-slew times, and weighted by the total counts in the corresponding time period using addrmf. An average response file is needed becuase a spectral fit using the pre-slew DRM will introduce some errors in both a spectral shape and a normalization if the PHA file contains a lot of the slew/post-slew time interval.
- 3) For fits to more complicated models (e.g. a power-law over a cutoff power-law), the BAT team has decided to require a chi-square improvement of more than 6 for each extra dof.
Time averaged spectrum fit using the average DRM
Power-law model
Time interval is from -58.984 sec. to 294.824 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.50031 ( -0.038551 0.0384863 )
Norm@50keV : 4.71434E-03 ( -9.04974e-05 9.04752e-05 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.02 using 59 PHA bins.
# Reduced chi-squared = 0.8074 for 57 degrees of freedom
# Null hypothesis probability = 8.507218e-01
Photon flux (15-150 keV) in 353.8 sec: 0.588583 ( -0.0132571 0.0133128 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.5822e-05 ( -3.11275e-07 3.11575e-07 ) ergs/cm2
Cutoff power-law model
Time interval is from -58.984 sec. to 294.824 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.49744 ( -0.0744348 0.0387744 )
Epeak [keV] : 9997.88 ( -9998.2 -9998.2 )
Norm@50keV : 4.72840E-03 ( -9.0422e-05 0.000599772 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 46.04 using 59 PHA bins.
# Reduced chi-squared = 0.8222 for 56 degrees of freedom
# Null hypothesis probability = 8.262488e-01
Photon flux (15-150 keV) in 353.8 sec: 0.588348 ( -0.013175 0.012934 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.58213e-05 ( -3.08266e-07 3.09327e-07 ) ergs/cm2
Band function
Time interval is from -58.984 sec. to 294.824 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.582744 ( 1.0027 1.0027 )
beta : -1.50907 ( -0.0478749 0.0418282 )
Epeak [keV] : 40.2409 ( -40.2345 113.959 )
Norm@50keV : 2.16403E-02 ( -0.0217608 406473 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 45.22 using 59 PHA bins.
# Reduced chi-squared = 0.8221 for 55 degrees of freedom
# Null hypothesis probability = 8.237867e-01
Photon flux (15-150 keV) in 353.8 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 17.7918 ( )
R^2/D10^2 : 3.46489E-02 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 651.73 using 59 PHA bins.
# Reduced chi-squared = 11.434 for 57 degrees of freedom
# Null hypothesis probability = 7.370357e-102
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.798e-07 3.167e-08
25- 50 3.575e-06 1.033e-07
50-150 8.189e-06 2.565e-07
15-150 1.254e-05 2.707e-07
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 200.000 ( )
Norm : 2.41504 (-0.0462855 0.0462852)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 78.77 using 59 PHA bins.
# Reduced chi-squared = 1.382 for 57 degrees of freedom
# Null hypothesis probability = 2.964496e-02
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.128e-06 4.936e-08
25- 50 4.093e-06 8.845e-08
50-150 8.977e-06 1.857e-07
15-150 1.520e-05 3.396e-07
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.47775 (-0.531881 0.562707)
R1^2/D10^2 : 0.482185 (-0.109691 0.149966)
kT2 [keV] : 30.0072 (-2.07426 2.53441)
R2^2/D10^2 : 4.75256E-03 (-0.00115507 0.00136213)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 56.63 using 59 PHA bins.
# Reduced chi-squared = 1.030 for 55 degrees of freedom
# Null hypothesis probability = 4.141157e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 1.870e-06 1.242e-07
25- 50 3.994e-06 1.574e-07
50-150 9.822e-06 4.016e-07
15-150 1.569e-05 5.112e-07
Peak spectrum fit
Power-law model
Time interval is from 208.760 sec. to 209.760 sec.
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.18170 ( -0.0635529 0.0634179 )
Norm@50keV : 6.63204E-02 ( -0.00226863 0.00226857 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.53 using 59 PHA bins.
# Reduced chi-squared = 0.9216 for 57 degrees of freedom
# Null hypothesis probability = 6.432201e-01
Photon flux (15-150 keV) in 1 sec: 7.76521 ( -0.274735 0.275104 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.76373e-07 ( -2.59862e-08 2.6096e-08 ) ergs/cm2
Cutoff power-law model
Time interval is from 208.760 sec. to 209.760 sec.
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.16775 ( -0.214032 0.0655719 )
Epeak [keV] : 9955.11 ( -9999.35 -9999.35 )
Norm@50keV : 6.72577E-02 ( -0.0022617 0.00229688 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.81 using 59 PHA bins.
# Reduced chi-squared = 0.9430 for 56 degrees of freedom
# Null hypothesis probability = 5.964819e-01
Photon flux (15-150 keV) in 1 sec: 7.76494 ( -0.27633 0.27237 ) ph/cm2/s
Energy fluence (15-150 keV) : 6.76176e-07 ( -1.374e-08 2.6156e-08 ) ergs/cm2
Band function
Time interval is from 208.760 sec. to 209.760 sec.
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : -0.454541 ( 0.798557 5.77692 )
beta : -1.19374 ( -0.658585 0.0697728 )
Epeak [keV] : 55.4322 ( -55.6466 309.415 )
Norm@50keV : 0.222735 ( -0.227937 3.54048e+06 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 52.12 using 59 PHA bins.
# Reduced chi-squared = 0.9477 for 55 degrees of freedom
# Null hypothesis probability = 5.853090e-01
Photon flux (15-150 keV) in 1 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
Single BB
Spectral model blackbody:
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 19.6184 ( )
R^2/D10^2 : 0.375026 ( )
(R is the radius in km and D10 is the distance to the source in units of 10 kpc)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 245.15 using 59 PHA bins.
# Reduced chi-squared = 4.3010 for 57 degrees of freedom
# Null hypothesis probability = 3.524779e-25
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 2.803e-08 1.885e-09
25- 50 1.379e-07 7.000e-09
50-150 3.922e-07 2.425e-08
15-150 5.581e-07 2.495e-08
Thermal bremsstrahlung (OTTB)
Spectral model: thermal bremsstrahlung
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT [keV] : 199.363 ( )
Norm : 32.0754 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 152.60 using 59 PHA bins.
# Reduced chi-squared = 2.6771 for 57 degrees of freedom
# Null hypothesis probability = 1.159288e-10
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 7.987e-08 2.995e-09
25- 50 1.536e-07 5.550e-09
50-150 3.370e-07 1.215e-08
15-150 5.705e-07 2.135e-08
Double BB
Spectral model: bbodyrad<1> + bbodyrad<2>
------------------------------------------------------------
Parameters : value Lower 90% Upper 90%
kT1 [keV] : 7.85055 (-1.01208 1.14038)
R1^2/D10^2 : 4.56736 (-1.57874 2.66598)
kT2 [keV] : 34.6133 (-4.33445 6.50121)
R2^2/D10^2 : 5.21315E-02 (-0.0212513 0.0279386)
------------------------------------------------------------
#Fit statistic : Chi-Squared = 55.29 using 59 PHA bins.
# Reduced chi-squared = 1.005 for 55 degrees of freedom
# Null hypothesis probability = 4.635995e-01
Energy Fluence 90% Error
[keV] [erg/cm2] [erg/cm2]
15- 25 5.909e-08 7.325e-09
25- 50 1.430e-07 1.115e-08
50-150 4.790e-07 5.405e-08
15-150 6.811e-07 6.630e-08
Pre-slew spectrum (Pre-slew PHA with pre-slew DRM)
Power-law model
Spectral model in power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.66541 ( -0.22431 0.229222 )
Norm@50keV : 1.32012E-03 ( -0.000177046 0.000174092 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.27 using 59 PHA bins.
# Reduced chi-squared = 1.215 for 57 degrees of freedom
# Null hypothesis probability = 1.277376e-01
Photon flux (15-150 keV) in 82.2 sec: 0.173262 ( -0.0218356 0.0218766 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00771e-06 ( -1.41993e-07 1.43931e-07 ) ergs/cm2
Cutoff power-law model
Spectral model in the cutoff power-law:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
Photon index: 1.67201 ( -0.231174 0.225191 )
Epeak [keV] : 9999.36 ( -9999.35 -9999.36 )
Norm@50keV : 1.31736E-03 ( )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 69.27 using 59 PHA bins.
# Reduced chi-squared = 1.237 for 56 degrees of freedom
# Null hypothesis probability = 1.095751e-01
Photon flux (15-150 keV) in 82.2 sec: 0.173272 ( -0.021891 0.021796 ) ph/cm2/s
Energy fluence (15-150 keV) : 1.00584e-06 ( -7.31827e-08 1.43686e-07 ) ergs/cm2
Band function
Spectral model in the Band function:
------------------------------------------------------------
Parameters : value lower 90% higher 90%
alpha : 4.64731 ( -4.64731 -4.64731 )
beta : -1.76634 ( -0.287061 0.259773 )
Epeak [keV] : 23.8153 ( -23.8153 5.66681 )
Norm@50keV : 119.417 ( -14.6865 972791 )
------------------------------------------------------------
#Fit statistic : Chi-Squared = 68.25 using 59 PHA bins.
# Reduced chi-squared = 1.241 for 55 degrees of freedom
# Null hypothesis probability = 1.081397e-01
Photon flux (15-150 keV) in 82.2 sec: ( ) ph/cm2/s
Energy fluence (15-150 keV) : 0 ( 0 0 ) ergs/cm2
S(25-50 keV) vs. S(50-100 keV) plot
S(25-50 keV) = 3.91e-06
S(50-100 keV) = 5.53e-06
T90 vs. Hardness ratio plot
T90 = 265.915999948978 sec.
Hardness ratio (energy fluence ratio) = 1.41432
Color vs. Color plot
Count Ratio (25-50 keV) / (15-25 keV) = 1.31857
Count Ratio (50-100 keV) / (15-25 keV) = 1.01945
Mask shadow pattern
IMX = 7.257620045731079E-01, IMY = 1.936348075317588E-01
TIME vs. PHA plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
TIME vs. DetID plot around the trigger time
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
100 us light curve (15-350 keV)
Blue+Cyan dotted lines: Time interval of the scaled map
From 0.000000 to 64.000000
Spacecraft aspect plot
Bright source in the pre-burst/pre-slew/post-slew images
Pre-burst image of 15-350 keV band
Time interval of the image:
Pre-slew background subtracted image of 15-350 keV band
Time interval of the image:
-9.099400 73.100600
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9902 -15.6055 3.3 53.8 -37.9 1.8881 3.5 2.2 Sco X-1
254.4692 35.3669 1.9 22.9 38.5 0.7408 6.1 1.6 Her X-1
268.3198 -1.3382 4.0 29.9 -57.7 0.4281 2.9 7.4 SW J1753.5-0127
273.8424 -13.9062 0.0 40.9 -72.1 -0.2193 -0.6 12.3 GX 17+2
288.7450 10.8765 3.1 18.1 -111.5 0.4138 3.7 5.2 GRS 1915+105
299.6421 35.1986 1.1 19.4 158.8 1.1872 11.0 2.5 Cyg X-1
307.9208 41.0090 17.8 27.6 151.3 -0.0961 -0.6 9.2 Cyg X-3
326.0396 38.2630 12.4 40.7 161.3 0.2089 0.9 7.1 Cyg X-2
245.8788 7.6135 0.9 36.9 -14.9 1.8500 12.8 ------ UNKNOWN
320.7316 11.9335 3.5 41.6 -157.6 0.5922 3.3 ------ UNKNOWN
290.2195 2.5300 2.4 26.3 -105.5 0.6727 4.9 ------ UNKNOWN
249.0754 -16.2912 3.1 52.0 -42.3 2.3800 4.4 ------ UNKNOWN
248.8644 -16.3305 3.5 52.1 -42.1 2.5454 4.6 ------ UNKNOWN
Post-slew image of 15-350 keV band
Time interval of the image:
137.500590 963.062100
# RAcent DECcent POSerr Theta Phi PeakCts SNR AngSep Name
# [deg] [deg] ['] [deg] [deg] [']
244.9782 -15.6400 0.3 23.2 -38.5 28.2598 45.2 0.1 Sco X-1
254.4717 35.3670 1.7 28.9 153.9 5.8933 6.7 1.6 Her X-1
256.2217 -37.8135 7.2 46.4 -52.0 -4.0499 -1.6 11.3 4U 1700-377
256.3848 -36.5226 5.0 45.2 -52.6 4.9974 2.3 6.4 GX 349+2
263.0661 -24.7635 2.9 36.4 -67.6 4.9763 4.0 3.3 GX 1+4
268.3510 -1.4781 1.7 24.2 -109.6 4.6373 6.8 1.8 SW J1753.5-0127
270.3773 -25.1240 5.8 40.5 -76.1 4.1686 2.0 5.7 GX 5-1
270.3893 -25.6552 9.9 40.9 -75.6 2.5000 1.2 7.1 GRS 1758-258
273.9841 -14.0326 5.5 35.3 -93.0 2.5060 2.1 1.3 GX 17+2
288.7727 11.0020 2.7 42.4 -138.8 4.8262 4.3 3.7 GRS 1915+105
299.7260 35.3102 9.4 56.4 -168.5 3.0757 1.3 9.3 Cyg X-1
262.8285 -33.8984 14.8 44.5 -60.9 1.7741 0.8 8.9 GX 354-0
222.0962 42.6694 2.2 40.9 112.3 13.8420 5.1 ------ UNKNOWN
206.2260 -32.5968 3.5 55.1 0.2 8.5025 3.3 ------ UNKNOWN
245.8649 7.6188 0.3 0.0 106.7 20.0237 33.9 ------ UNKNOWN
298.3225 37.9605 2.5 56.1 -171.9 11.2703 4.6 ------ UNKNOWN
216.0965 -45.6954 3.2 59.6 -17.0 12.5563 3.6 ------ UNKNOWN
Plot creation:
Sat May 30 23:15:40 EDT 2015